German Sauter Feinmechanik seals Sauter Feinmechanik models Sauter Feinmechanik prices

Sauter Feinmechanik seals are a type of friction seal or stuffing box used to prevent liquid leakage between the shaft and bearing of compressors or other fluid handling equipment. They are also sealing devices installed to prevent leakage at the pump shaft and housing. Common types of shaft seals include packing seals, mechanical seals, and hydrodynamic seals. The shaft seal of a reciprocating pump is typically a packing seal. When transporting media where leakage is not permitted, diaphragm reciprocating pumps can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly consist of packing seals, mechanical seals, and hydrodynamic seals.

Sauter Feinmechanik seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The seal body is further divided into the bottom, waist, cutting edge, and sealing lip according to different sections. Typically, in its free state, the inner diameter of the skeleton oil seal is smaller than the shaft diameter, meaning it has a certain amount of "interference fit." Therefore, after the oil seal is installed on the seal housing and shaft, the pressure from the seal's cutting edge and the contraction force of the self-tightening helical spring exert a certain radial clamping force on the shaft. After a period of operation, this pressure will rapidly decrease or even disappear; thus, the spring can continuously compensate for the oil seal's self-tightening force.

Sauter Feinmechanik seal usage guidelines

1) When the gearbox lubricating oil volume is ≤ 7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals that are not temporarily in use should be stored properly to prevent contamination with oil stains, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop so that it no longer seals effectively, a displacement method can be used to compensate.

Sauter Feinmechanik seal installation technical requirements

Mechanical seals are high-precision mechanical components, and their correct installation and operation significantly impact their service life. We generally follow the standards specified by the Ministry of Petrochemical Industry. The technical requirements for the pump installing the mechanical seal and the mating parts of the mechanical seal are as follows: 1) Shaft runout: maximum not greater than 0.05 mm; 2) Rotor wobble: near the shaft sleeve at the rotating ring seal circle, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm; if equipped with a shaft sleeve, the sleeve must not be loose; 4) Coupling alignment error: for gear couplings, not greater than 0.08～0.10 mm (P2008C); for elastic couplings, not greater than 0.05～0.06 mm; (common practice end face runout<0.05, radial runout<0.10) 5) The concentricity tolerance of the gland (static ring seat) and the sealing spigot relative to the shaft centerline is 0.05 mm, and the perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03～0.05 mm. If these requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the rotating ring seal is installed, and the ends of the gland (or housing) where the static ring seal is installed, should be chamfered and smoothed. 7) Be careful when installing or removing mechanical seals; strictly prohibit the use of hammers and flat chisels to avoid damaging seal components. If scaling prevents removal, clean thoroughly before attempting removal again. 8) If mechanical seals are used on both ends of the pump, take care during assembly and disassembly to avoid neglecting one side while attending to the other. 9) For mechanical seals that have been in operation, if gland loosening causes seal movement, the stationary and rotating ring components must be replaced and should not be simply retightened for continued use. This is because loosening alters the original operating trajectory of the friction pair, easily compromising the sealing integrity of the contact surfaces.

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